package com.huawei.utils;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.parser.ParserConfig;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.type.TypeFactory;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.SerializationException;

import java.nio.charset.Charset;

/**
* Redis使用FastJson序列化
*
* @author szay2005
*/
public class FastJsonRedisSerializer<T> implements RedisSerializer<T>
{

      public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");

      private Class<T> clazz;

      static
     {
            ParserConfig.getGlobalInstance().setAutoTypeSupport(true);
     }

      public FastJsonRedisSerializer(Class<T> clazz)
     {
            super();
            this.clazz = clazz;
     }

      @Override
      public byte[] serialize(T t) throws SerializationException
     {
            if (t == null)
           {
                  return new byte[0];
           }
            return JSON.toJSONString(t, SerializerFeature.WriteClassName).getBytes(DEFAULT_CHARSET);
     }

      @Override
      public T deserialize(byte[] bytes) throws SerializationException
     {
            if (bytes == null || bytes.length <= 0)
           {
                  return null;
           }
            String str = new String(bytes, DEFAULT_CHARSET);

            return JSON.parseObject(str, clazz);
     }


      protected JavaType getJavaType(Class<?> clazz)
     {
            return TypeFactory.defaultInstance().constructType(clazz);
     }
}



